Thanks for the nice tutorial. I know about GLDAS product but I don't know how can I get residual soil moisture, field capacity, depletion factor and etc ? Could you guide me regarding this, please?
Thank you for this interesting video. I just want to ask you how to include data for multiple meteorological stations included in the study area on the input excel sheet.
You can make an interpolated raster from the meteo stations and add the path to this raster map, if you have a good network of stations. Otherwise only one station data can be given as input as a number
Sir, I created raster for individual weather parameter using interpolation of several point data. I gave those meteorolgical data as input in tif format. It's showing error after running the SEBAL. Sir, can you please suggest what to do?
You said pySEBAL takes the extent of DEM. Can you please comment that does DEM resolution (spatial) also determines the spatial resolution of generated products ? If not , which factors / input data are responsible for characterizing the spatial resolution of the outputs ?
Hello Sir, thank you for the detailed tutorial. I am providing numbers as meteorological data rater than rasters. Because I am using the Accuweather API data for the location. Don't have access to instantaneous parameters. Is that fine? Also the ET deficit raster that it produces have majority of pixel values as zero. What could be the reason?
yes thats possible. By default I have removed saving of LE and H as tif files. But you can easily edit the pysebal_py3.py file and enable saving of those files.
Sir got stuck in the data preparation process&getting error in the Osgeo4 shell grass envi for some part of the code..if any one out there has completed this process to calculate ET can you explain..
Good morning! My name is Lorena de Moura Melo and I am a doctoral student in the Postgraduate Program in Forest Sciences - UFRPE. I am starting research that involves a temporal analysis of the behavior of evapotranspiration in the Tropical Dry Forest in Northeastern Brazil. In this area I want to apply pySEBAL, but I have doubts about the procedures for obtaining Meteorological data. In the manual what would be "echo $HOME", as I "Start the Linux bash", what precedes "commands to extract variables required from GLDAS" and in which folders should I save the GLDAS files I downloaded? Can you help me? Thank you very much in advance! I'm waiting! Yours sincerely
Respected Sir, Where can I get the RH, Wind Speed and remaining meteorological rasters? Can you kindly suggest me the source and transformations that you've applied to bring to units.
Respected Sir, I used DEM file for my area of interest to run PySEBAL. But, while getting output it not covered the entire extent (boundary) of area of intereset. Small extent of area at right, top and bottom is missed/cut. Can you please give idea to correct the error?
@@spareeth1981 Sir, Its single tile only. Sir, I also have another question. Both my DEM and hydraulic raster are in the WGS 1984 projection. Do I need to modify the projection of the DEM and soil hydraulic raster before using PySEBAL?
Dear Sir, Kindly make a video for data prepration for this tutorial.What preprocessing steps are required to use landsat collection1 level-1 data? Does this model support landsat collection2 level-2 data? If not supported, what changes need to be made to use collection2 level-2 data for pysebal models? In addition, how to obtain soil moisture characteristic data? If it cannot be obtained directly, how should it be calculated?
@@yuzi-hq2bf PySEBAL need level 1 data as input. It can be collection 1 or 2. Rest of the preprocessing of Landsat data will be taken care by PySEBAL. You can get the hydrualic soil properties data from here: www.futurewater.eu/projects/hihydrosoil/ This data is also available in GEE.
@@spareeth1981 Thank you very much for your answer sir. I still have questions to ask you. I downloaded the remote sensing data of landsat collection1 level-1 and the dem data of the corresponding strips, and input them into the form given in the case. The other data remained unchanged, but it got stuck at Module 4 during the operation, which was displayed as “Mean water temperature = nan (Kelvin) SD water temperature = nan (Kelvin) NDVI threshold for cold pixels = nan SEBAL did not run line 2 fully". I've spent a week on this and still can't figure it out, I really hope you can take the time to check it out sir. Thank you very much! !
Hello, thanks for the tutorial. Could you explain in detail the part of the meteo data downloaded from GLDAS and the reading process through OSGeo4?
Thanks for the nice tutorial. I know about GLDAS product but I don't know how can I get residual soil moisture, field capacity, depletion factor and etc ? Could you guide me regarding this, please?
Hello Sir, I would like to ask you, is it possible to apply pysebal on Sentinel-2 images or hyperspectral data retrieved from CASI and SASI sensors?
Thank you for this interesting video. I just want to ask you how to include data for multiple meteorological stations included in the study area on the input excel sheet.
You can make an interpolated raster from the meteo stations and add the path to this raster map, if you have a good network of stations. Otherwise only one station data can be given as input as a number
@@spareeth1981 Thank you Sir
Hi, is there any tutorial on how to obtain the meteo data? I am unable to use GRASS as suggested in pysebal documentation.
Sir, I created raster for individual weather parameter using interpolation of several point data. I gave those meteorolgical data as input in tif format. It's showing error after running the SEBAL.
Sir, can you please suggest what to do?
You said pySEBAL takes the extent of DEM. Can you please comment that does DEM resolution (spatial) also determines the spatial resolution of generated products ? If not , which factors / input data are responsible for characterizing the spatial resolution of the outputs ?
The spatial resolution of the outputs are 30m, matching the Landsat. Only boundary extent of outputs are taken from DEM
Sir can you please explain how can i calculate total annual evapotranspiration using this method?
Hello Sir, thank you for the detailed tutorial. I am providing numbers as meteorological data rater than rasters. Because I am using the Accuweather API data for the location. Don't have access to instantaneous parameters. Is that fine? Also the ET deficit raster that it produces have majority of pixel values as zero. What could be the reason?
You have to provide instantaneous data as it influence the results. The daily average and the instantaneous can be quite different.
sir, really helpful video, can i get value of sensible and latent heat flux using this method ?
yes thats possible. By default I have removed saving of LE and H as tif files. But you can easily edit the pysebal_py3.py file and enable saving of those files.
Sir got stuck in the data preparation process&getting error in the Osgeo4 shell grass envi for some part of the code..if any one out there has completed this process to calculate ET can you explain..
Good morning! My name is Lorena de Moura Melo and I am a doctoral student in the Postgraduate Program in Forest Sciences - UFRPE. I am starting research that involves a temporal analysis of the behavior of evapotranspiration in the Tropical Dry Forest in Northeastern Brazil. In this area I want to apply pySEBAL, but I have doubts about the procedures for obtaining Meteorological data. In the manual what would be "echo $HOME", as I "Start the Linux bash", what precedes "commands to extract variables required from GLDAS" and in which folders should I save the GLDAS files I downloaded? Can you help me? Thank you very much in advance! I'm waiting!
Yours sincerely
Hi Lorena. Were you able to figure it out and implement the algorithm ? Please let me know
Respected Sir, Where can I get the RH, Wind Speed and remaining meteorological rasters? Can you kindly suggest me the source and transformations that you've applied to bring to units.
Dear Sir Kindly make a video for data prepration for this tutorial
Usually the meteo data is taken from a ground meteo station. Or we use global climate datasets like GLDAS, ERA5 etc.
Respected Sir,
I used DEM file for my area of interest to run PySEBAL. But, while getting output it not covered the entire extent (boundary) of area of intereset. Small extent of area at right, top and bottom is missed/cut. Can you please give idea to correct the error?
Hi, not sure, is it covering a single tile of Landsat or multiple tiles?
@@spareeth1981 Sir, Its single tile only. Sir, I also have another question. Both my DEM and hydraulic raster are in the WGS 1984 projection. Do I need to modify the projection of the DEM and soil hydraulic raster before using PySEBAL?
@@PavithranPeriyasamy Hi, I have the same problem, a small extent of area at right is cut. Can you let me know what the solution to the problem was?
Dear Sir, Kindly make a video for data prepration for this tutorial.What preprocessing steps are required to use landsat collection1 level-1 data? Does this model support landsat collection2 level-2 data? If not supported, what changes need to be made to use collection2 level-2 data for pysebal models? In addition, how to obtain soil moisture characteristic data? If it cannot be obtained directly, how should it be calculated?
Looking forward to your guidance
@@yuzi-hq2bf PySEBAL need level 1 data as input. It can be collection 1 or 2. Rest of the preprocessing of Landsat data will be taken care by PySEBAL. You can get the hydrualic soil properties data from here: www.futurewater.eu/projects/hihydrosoil/ This data is also available in GEE.
@@spareeth1981 Thank you very much for your answer sir. I still have questions to ask you. I downloaded the remote sensing data of landsat collection1 level-1 and the dem data of the corresponding strips, and input them into the form given in the case. The other data remained unchanged, but it got stuck at Module 4 during the operation, which was displayed as
“Mean water temperature = nan (Kelvin)
SD water temperature = nan (Kelvin)
NDVI threshold for cold pixels = nan
SEBAL did not run line 2 fully".
I've spent a week on this and still can't figure it out, I really hope you can take the time to check it out sir. Thank you very much! !
@@spareeth1981 Looking forward to your guidance